We began packing the freight cars much more tightly. 我们开始把货运汽车装得更加密集。
Presently, the Czech Republic and Slovakia maintain extremely close bilateral ties and cooperate amiably within the framework of the European Union. 目前捷克共和国与斯洛伐克维持著极度良好的双边关系，并且在欧盟的架构之下，进行极为密集与友好的合作关系。
In the hexagonal close packed structure, slip systems are more limited. 在六方密排晶格中，滑移系受到较多的限制。
